18972524 has 12 divisors (see below), whose sum is σ = 33697944. Its totient is φ = 9344544.

The previous prime is 18972517. The next prime is 18972529. The reversal of 18972524 is 42527981.

It is not an unprimeable number, because it can be changed into a prime (18972529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35129 + ... + 35664.

It is an arithmetic number, because the mean of its divisors is an integer number (2808162).

Almost surely, 2^18972524 is an apocalyptic number.

It is an amenable number.

18972524 is a deficient number, since it is larger than the sum of its proper divisors (14725420).

18972524 is a wasteful number, since it uses less digits than its factorization.

18972524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70864 (or 70862 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 18972524 is about 4355.7460899368. The cubic root of 18972524 is about 266.7114764977.

The spelling of 18972524 in words is "eighteen million, nine hundred seventy-two thousand, five hundred twenty-four".